diff options
Diffstat (limited to 'tools/libxc')
| -rw-r--r-- | tools/libxc/xc_dom_core.c | 3 | ||||
| -rw-r--r-- | tools/libxc/xc_dom_x86.c | 12 |
2 files changed, 14 insertions, 1 deletions
diff --git a/tools/libxc/xc_dom_core.c b/tools/libxc/xc_dom_core.c index 99f90dd45e..c8062d8773 100644 --- a/tools/libxc/xc_dom_core.c +++ b/tools/libxc/xc_dom_core.c @@ -873,7 +873,8 @@ int xc_dom_build_image(struct xc_dom_image *dom) goto err; if ( dom->arch_hooks->count_pgtables ) { - dom->arch_hooks->count_pgtables(dom); + if ( dom->arch_hooks->count_pgtables(dom) != 0 ) + goto err; if ( (dom->pgtables > 0) && (xc_dom_alloc_segment(dom, &dom->pgtables_seg, "page tables", 0, dom->pgtables * page_size) != 0) ) diff --git a/tools/libxc/xc_dom_x86.c b/tools/libxc/xc_dom_x86.c index 0cf1687718..240d7265fa 100644 --- a/tools/libxc/xc_dom_x86.c +++ b/tools/libxc/xc_dom_x86.c @@ -82,6 +82,7 @@ static int count_pgtables(struct xc_dom_image *dom, int pae, { int pages, extra_pages; xen_vaddr_t try_virt_end; + xen_pfn_t try_pfn_end; extra_pages = dom->alloc_bootstack ? 1 : 0; extra_pages += dom->extra_pages; @@ -91,6 +92,17 @@ static int count_pgtables(struct xc_dom_image *dom, int pae, { try_virt_end = round_up(dom->virt_alloc_end + pages * PAGE_SIZE_X86, bits_to_mask(22)); /* 4MB alignment */ + + try_pfn_end = (try_virt_end - dom->parms.virt_base) >> PAGE_SHIFT_X86; + + if ( try_pfn_end > dom->total_pages ) + { + xc_dom_panic(dom->xch, XC_OUT_OF_MEMORY, + "%s: not enough memory for initial mapping (%#"PRIpfn" > %#"PRIpfn")", + __FUNCTION__, try_pfn_end, dom->total_pages); + return -ENOMEM; + } + dom->pg_l4 = nr_page_tables(dom, dom->parms.virt_base, try_virt_end, l4_bits); dom->pg_l3 = |